History of the LZ 127 Graf Zeppelin: It was constructed as a passenger airship for long distances. The hull of the LZ 127 is divided into 17 compartments, each containing a hydro-gas cell. Altogether 105,000 cubic meters of hydrogen gas can be taken in. In the rigid frame there is room not only for the hydro-gas but also for the liquefied petroleum gas. The main rings are at intervals of an average of 15 m and are crossed diagonally with steel wires. The outer skin consists of cotton material which is painted over. In order to avoid too much influence by the sun, aluminium powder is mixed into the paint. That is the reason for its silver-colored appearance. The altitude and side rudders at the rear can either be operated by hand or electrically. There was also a rudder indicator showing the position of the rudders. The LZ 127 was driven by five engines in the machine gondolas outside the hull. Powerful Maybach 12-cylinder engines driven by gas or petrol each developed 530 hp. So that there would be no air eddies, which would each disturb the other, the two front engine gondolas are somewhat higher and further apart than the middle ones. The only rear engine hangs in the middle. Machinists operated the engines and controlled the performance during the flight directly from the gondolas. In order to get there, they had to use walkways in the interior of the airship. The measurements of the LZ 127 are comparable to a huge ocean liner: 236.6 m long and 30.5 m largest diameter. In spite of this, it only weighed 58 tons. As a comparison: a Jumbo Jet seems pretty paltry with a length of 71 m. The overall performance of 2,650 hp allowed a great speed of 100-110 km/h, the top speed was 128 km/h. 20 passengers could be transported a distance of 10,000 km. Tools needed to complete construction: mid-sized scissors, modeling knife, water-based glue, ruler or triangle, and modeling pins. Tools Not Included.